I don’t know of any senior female exec being fired, Kathleen Kennedy is still the president of Lucasfilm and she was the one copping a lot of the flak around the latest films?
The story you’re talking about regarding an alternative timeline was just some made up internet rumour, I remember reading something about it a few months ago and it was a bit bonkers to be honest.
The Obi-Wan show has been planned for quite a while (not sure, but I think it was going to be a movie at some point), it’s not a re-set or anything like that.
I’m quite surprised about Hayden Christensen coming back as Vader, I’d previously read a rumour that Darth Maul was going to be a major character in it.